Physical weathering: This refers to the process of weathering that takes place by climatic factors such as wind, rain, ice, snow, temperature, etc
Chemical weathering: This refers to the process of weathering that takes place by chemical factors or chemical processes such as hydration, hydrolysis, oxidation, reduction, etc.
Biological weathering: This refers to the process of weathering that takes place by biological factors or living organisms such as lichens and bryophytes.